| 摘要 |
<p>A system for determining the speed and the position of a train or a similar vehicle, comprises an image capture device, for mounting on the train in such a position that it can capture a sequence of images of the environment ahead of or behind the train, and an image processor, for processing the images captured by the image capture device. The image processor processes said sequence of images and derives the speed of the train from the apparent motion of objects in the images, and recognizes trackside markers, each of which uniquely identifies its position, thus deriving the position of the train from the identity of the marker. In a preferred form, the markers are 2D barcodes.</p> |
